Stomatal density and stomatal length in relation to photosynthetic and transpirational behaviour of paddy rice varieties and their yield, and yield components.

气孔密度和气孔长度与水稻品种光合和蒸腾行为及其产量和产量构成的关系。

• 批准号: 60480035
• 负责人: JODO Shuichiro
• 金额: $ 4.1万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60480035/
• 关键词: Rice variety; Photosynthesis; Transpiration; Stomatal conductance; Stomatal density; Stomatal length; Yield components; 携帯型分析計

Fifteen varieties of paddy rice (Oryza sativa L. subsp. japonica and subsp. indica) including different plant types were chosen from current and past recommended varieties in Ehime prefecture and from super high yield varieties. Photosynthetic and transpiration rates of flag leaves were measured hourly for several days from heading through ripening periods using a portable gas analyzer (Analytical Development Co. Ltd., England). Stomatal density( <mm^(-2)> ) and stomatal length ( <mu> ) were examined with enamel repricas of abaxial and adaxial sides of the flag leaf. The leaf area, yield and yield components were also investigated.1. Varietal difference of net photosynthetic rate was clearly indicated on a fine day, although the difference disappeared when clouds arouse around at noon even in a few hours.2. Many varieties showed their maximum photosynthesis at 10-12 a.m. In some varieties, however, the maximum occurred at 8-9 a.m. and 2 p.m. independently of solar radiation intensities … More .3. A high correlation coefficient r= <0.783^(***)> was observed between varietal photosynthetic rates and varietal stomatal conductances on a fine day.4. Relations between stomatal conductance and stomatal density X stomatal length were investigated in each hour. Strong correlations were generally recognized, but they disappeared at hours when solar radiation exhibited very high intensities. The author considered that the potential stomatal conductance of varieties was essentially related with their stomatal density X stomatal length. Therefore, the correlation was weakened by stomatal closure of varieties which developed water stress.5. Super high yield Korean varieties had very many stomata,ranging from 5.6 to 7.1 millions per flag leaf in number. This number was 2-2.5 times as large as that of Japanese common varieties. Total stomatal length (= number of stomata X stomatal length) of the flag leaf was severely correlated with number of grains per head (r= <0.784^(***)> ), and with yield (r= <0.694^(**)> ). Less

水稻品种(Oryza sativa L.subsp.和亚种。包括不同株型在内的不同株型，分别从爱护县现有和过去的推荐品种以及超高产品种中选出。使用便携式气体分析仪(英国分析发展有限公司)，在抽穗至成熟期的几天内每小时测量一次旗叶的光合作用和蒸腾速率。气孔密度(~lt；mm^(-2)&gt；)和气孔长度(~lt；mm^(-2)&gt；)用旗叶背面和近轴面的珐琅彩进行了测定。对叶面积、产量及产量构成因素进行了研究。在晴朗的天气下，净光合速率的品种差异明显，但当中午附近出现云层时，即使在几个小时内，这种差异也消失了。许多品种的光合作用高峰出现在上午10点至12点。然而，在一些品种中，最大值出现在上午8点至9点。和下午2点与太阳辐射强度无关的…更多.3。晴天不同品种的光合速率与气孔导度之间存在较高的相关系数r=lt；0.783^(*)。每小时测定气孔导度与气孔密度、气孔长度的关系。人们普遍认识到强烈的相关性，但当太阳辐射表现出非常高的强度时，它们就消失了。作者认为，品种的潜在气孔导度与其气孔密度×气孔长度有本质关系。因此，水分胁迫品种的气孔关闭削弱了这种相关性。韩国超高产品种气孔较多，每片旗叶气孔数在560万~710万个之间。这一数字是日本普通品种的2-2.5倍。旗叶气孔总长度(=气孔数×气孔长度)与人均粒数(r=0.784^**)和产量(r=0.694^(**)&gt；)呈极显著正相关。较少

项目成果

JODO, Shuichiro: "Stomatal Density and Stomatal Length in Relation to Photosynthetic and Transpirational Behaviour of Paddy Rice Varieties and Their Yield, and Yield Components." Japanese Jour. Crop Sci.56. in preparation (1987)

JODO，Shuichiro：“气孔密度和气孔长度与水稻品种光合和蒸腾行为及其产量和产量组成的关系。”

上堂秀一郎: 愛媛大学農学部紀要. 31. 1-130 (1986)

上户秀一郎：爱媛大学农学部通报，31. 1-130 (1986)。

上堂秀一郎: 日本作物学会紀事. 56. (1987)

Shuichiro Kamido：日本作物科学学会杂志 56。（1987）

JODO, Shuichiro: "Eco-Physiological Studies on Crop Water Relations and Stomatal Characteristics" Mem. Coll. Agr., Ehime University. 31. 1-130 (1986)

JODO，Shuichiro：“作物水分关系和气孔特征的生态生理学研究”Mem。